the (possible) perils of being thirsty while being green - polycarbonate plastic
Alina tugend January shortcut.
5,2008 I have the usual New Year's resolutions
Exercise more, lose weight, be a better person.
I also hope to find out if I accidentally poisoned my child.
What I am concerned about is the reuse of plastic bottles known as "disposable use" such as the Polish spring.
I buy them not because I don't trust tap water in New York, but because they are easy to carry in cars and various children's sports events.
If a person gets lost as usual, it's no big deal.
We refill them with tap water and use them multiple times before recycling.
I think I'm doing my job.
But did I hurt the health of my family to save the planet?
I heard it's not a good idea to renew these singles.
Because plastic leaks dangerous chemicals, use bottles.
But is that enough for me to change my way?
What if I stop using plastic bottles and then drink a little less water?
Is this a good trade? off?
Advertising is an old problem about risks and benefits.
Here's what I found: most of the plastic bottoms are printed with numbers 1 to 7
These numbers are used to indicate how plastics are recycled or disposed.
Advertising the types of plastic bottles that usually hold water, soda, and juice are made of petroleum-polybendiester
Material-based labeled No is also called PET1.
The problem with the reuse of these plastic bottles is that each time they are cleaned and refilled, they become more rough and rough, which can cause them to degrade.
This could lead to the dissolution of a trace metal called antimony, Frederick S said.
Vom Saal, a professor of biology at the University of Missouri, has studied plastics for years.
"We have to assume that other metals, except for this one, are almost certainly losing as well, but we don't know what they are or what to look, because the manufacturer will not tell us what else is in the bottle, "said Professor vom Saal.
One of the inaccuracies I 've had over and over again is that a chemical called phthal acid salts can interfere with male hormones and pose a danger to this water bottle. Lynn R.
Goldman, professor of environmental health at Bloomberg School of Public Health at Johns Hopkins, said the truth is that it is almost invisible to the loss.
Perhaps even more worrying because of the bottle
Their little opening.
It's harder to wash off than wide-
Mouth hiking and sports bottles that can hold bacteria.
At this point, I am not very anxious about the repeated use of the bottle several times --
This is usually everything we can do before we lose them or they crash.
But maybe a better choice.
In terms of health and environment-
It is a hard plastic bottle made of polyester plastic that is usually known by the brand NAL gene.
It has digital 7 printed on the bottom and is the same type of material that makes some baby bottles, tin cans lining and other products.
I have some around the house.
They are too big to fit our car cup holders so I put them in the basement.
Is it time to dig them out? Not quite.
Environmental protection organizations and some scientists have said that the plastic can be derived from endocrine substances --
This is a big enough problem that last year, the National Toxicology project Human Reproductive Risk Assessment Center held a 12-
A team of member experts reviewing research related to chemicals.
At the same time, another government --
A funding team of about 40 scientists with expertise in biphenol A reviewed more than 700 related studies.
This is where it gets a little tricky.
The first group concluded that the extent to which most people are exposed to this chemical is well below EPA standards.
Nevertheless, the panel expressed "some concern" about the possible causes of this chemical to cause behavioral and neurological problems in developing fetus and young children ".
For more information, please visit www. niehs. nih. gov.
Michael D said more research is being done on some aspects of this chemical.
Shelby, director of the center, will release a final briefing this summer.
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But Professor vom Saal, the leading author of the scientists report, said their findings were far from as good.
"There is a high level of concern about the potential harm of biphenol a to animals, including the possibility of diabetes, cancer and obesity," he said . ".
"The group's prediction is that we can expect people to suffer similar injuries.
The industry also has its own views.
Steven Hentges, executive director of the pc/BPA Global Group of the US chemical Commission, denied concerns about biphenol A and said there was no national ban or restriction on the use of this chemical.
"No government agency has reason to be shocked," he said . "
On its website, Nalgene came to the same conclusion.
Forgot those bottles?
The fact is that, from resin used to cover the internal surface of most food and beverage cans to some children's toys, there is A double phenol A in many types of materials.
Professor Goldman Sachs says it is a danger to focus on bottles rather than on the need for the government to regulate the widespread use of these chemicals.
But choosing the water container you use can give you a little sense of control.
Professor Vom Saal pointed out that the scope of people's exposure varies greatly.
Therefore, it may be a good idea to exchange a plastic water bottle made of glass or stainless steel.
Forget the glass for obvious reasons (
"Mom, I just cut my finger ").
Searches for existing stainless steel bottles show they cost about $16
This is a safer but more expensive option, because no matter how hard we try, we will be sure to spread them out in every area.
"If I use plastic, I will stay where there is no plastic. 2 and No.
Professor Vom Saal said. No. 2 is high-
Polyethylene density; No.
5 is polypropylene.
They are all used in artificial butter barrels and yogurt containers, for example.
But he warned against heating any type of plastic in the microwave.
If you do use this
Plastic bottles, a green guide published by the National Geographic Society, recommend that you do not wash them with a dishwasher or harsh detergent to limit wear and tear.
There is no doubt that some readers think it is absurd to worry about such risks, while others throw away their plastic bottles immediately.
I'm still on the fence.
So, in an indecisive frenzy, I decided to look elsewhere and try to be good for the environment.
What about the plastic bags we use to make sandwiches and snacks?
Is there a way to reduce them?
A friend suggested wax paper and tin paper. “The big trade-
Seth Bauer, editorial director of the Green Guide and green energy, said: "The closure is between manufacturing and disposal . ". com.
"The manufacturing efficiency of plastic is very high, the energy consumption is much lower, and the manufacturing process of wax paper is quite intensive.
Mining aluminum is also harmful to the environment and uses a lot of energy, he noted.
If the plastic bag does not clip meat, it can be washed out and then reused, but wax paper is better than plastic in handling.
There is also a website, www. reusablebags.
Com, which provides a package called-N-
Mat with Velcro closure ", you can wash and use it repeatedly for $6. 95 a pop.
I can try the old one.
I started searching the web for cute boxes shaped like sandwiches, and then realized that there were a lot of containers in my cabinet that could do the job well.
Stop buying and using things in our house?
Now, this will be an innovative solution. E-
Mail: shortcut @ nytimes.
The coma version of this article appears on the C5 page of The New York edition with the title :(Possible)
The danger of thirst when green.
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